adding USIKS (MKS/OKS) mod

should tick the checkmark of MKS/OKS in https://github.com/KSP-CKAN/CKAN-meta/issues/23

I'm unsure how many of the dependencies are required, but I chose to mark every module that is bundled with the MKS/OKS release zip-file as a dependency.
I just checked to see if you were right, but the latest release from github only includes the Firespitter plugin without the rest.